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https://issues.apache.org/jira/browse/HBASE-24742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17162382#comment-17162382
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Nick Dimiduk commented on HBASE-24742:
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bq. Looks like HBASE-19863 added some coverage. Do we need more than that?
It's hard to say; those tests pass with and without this change. We pushed a
change to critical section of code to all maintenance branches that was not
explicitly accompanied by updated test coverage. It will go out in patch
releases on three release lines. I'm just asking.
> Improve performance of SKIP vs SEEK logic
> -----------------------------------------
>
> Key: HBASE-24742
> URL: https://issues.apache.org/jira/browse/HBASE-24742
> Project: HBase
> Issue Type: Bug
> Components: Performance, regionserver
> Affects Versions: 3.0.0-alpha-1, 1.7.0, 2.4.0
> Reporter: Lars Hofhansl
> Assignee: Lars Hofhansl
> Priority: Major
> Fix For: 3.0.0-alpha-1, 2.3.1, 1.7.0, 2.4.0, 2.1.10, 2.2.6
>
> Attachments: 24742-master.txt, hbase-1.6-regression-flame-graph.png,
> hbase-24742-branch-1.txt
>
>
> In our testing of HBase 1.3 against the current tip of branch-1 we saw a 30%
> slowdown in scanning scenarios.
> We tracked it back to HBASE-17958 and HBASE-19863.
> Both add comparisons to one of the tightest HBase has.
> [~bharathv]
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